Radius (R) Used=10m Chord 2 Chord Distance%3D12.45m Chord Radius (R) Used=10m- steps: 1. Assign 3 marking randomly in a convenient distance in the middle but do not make it in a line that is straight. 2. Assign the 3marking pins as points C, A, B and B the middle marking pin. 3. Starting from B along BA measure a specific length perhaps 10 meters and mark the point using a marking pin. Assign point as one 4 Starting from B along BC measure 10 meters again and mark the point with a marking pin. Assign this point as two. 5. The length between the points 1 and 2 is called the chord distance. Measure distance between 2 and 1. 6. Solve for the angle using the formula below: ABC = 1-2 20 Sin or: Sin 1 ABC = Chord Distance 2Radius 12